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3 years ago

13

If one million people have equal chances of being called by telephone from a broadcasting show, then the probability of one part

icular person receiving that call is .

1 answer:

zhenek [66]3 years ago

7 0

1 /million is the chance
1/1,000,000 or in decimals 0.000001 is the chance

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The maximum weight of a truck on New York State turn weight is 40 tons how many pounds is

Vikki [24]

2000 pounds=1 ton

So 2000x40= 80,000

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3 years ago

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A real estate sales agent receives a salary of $250 per week plus a commission of 2% of sales. Write an

Tcecarenko [31]

Answer:

The equation y=0.02x+250 gives the weekly income y in terms of sales x.

Step-by-step explanation:

Given,

Weekly salary of real estate agent = $250

Commission rate = 2%

Let,

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y be the total weekly income.

Amount of commission = 2% of sales per week

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3 years ago

How do I solve this equation 10ac - x / 11 = -3

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Planes A & B are shown. If a new line, p, is drawn parallel to line l, which statement is true?

Alisiya [41]

The true statement is : Line p must be drawn so that it can lie on the same plane as line l

Step-by-step explanation:

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3 years ago

A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a populat

eimsori [14]

Answer:

$t=\frac{25-24}{\frac{2}{\sqrt{16}}}=2$

$p_v =P(t_{15}>2)=0.0320$

If we compare the p value and the significance level given for example $\alpha=0.05$ we see that $p_v$ so we can conclude that we reject the null hypothesis, and the true mean is significant higher than 24 years.

Step-by-step explanation:

1) Data given and notation

$\bar X=25$ represent the sample mean

$s=2$ represent the standard deviation for the sample

$n=16$ sample size

$\mu_o =24$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

Confidence =0.95 or 95%

$\alpha=0.05$

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to determine if the mean is higher than 24, the system of hypothesis would be:

Null hypothesis: $\mu \leq 24$

Alternative hypothesis: $\mu > 24$

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{25-24}{\frac{2}{\sqrt{16}}}=2$

Calculate the P-value

First we need to calculate the degrees of freedom given by:

$df=n-1=16-1=15$

Since is a one-side upper test the p value would be:

$p_v =P(t_{15}>2)=0.0320$

Conclusion

If we compare the p value and the significance level given for example $\alpha=0.05$ we see that $p_v$ so we can conclude that we reject the null hypothesis, and the true mean is significant higher than 24 years.

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3 years ago